 /*******************************************************************************
  * Copyright (c) 2001, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.views.properties.tabbed.view;

 import org.eclipse.jface.util.Assert;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.ui.IWorkbenchPart;


 /**
  * The default implementation of the content provider for the
  * tabbed property sheet page's list of tabs.
  *
  * @author Anthony Hunter
  */
 public class TabListContentProvider
     implements IStructuredContentProvider {
     
     private TabbedPropertyRegistry registry;

     private IWorkbenchPart currentPart;
     
     /**
      * Constructor for TabListContentProvider.
      */
     public TabListContentProvider(TabbedPropertyRegistry registry) {
         this.registry = registry;
     }
     
     /**
      * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
      */
     public Object [] getElements(Object inputElement) {
         Assert.isTrue(inputElement instanceof ISelection);
             return registry
             .getTabDescriptors(currentPart, (ISelection) inputElement);
     }

     /**
      * @see org.eclipse.jface.viewers.IContentProvider#dispose()
      */
     public void dispose() {
         /* not used */
     }

     /**
      * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
      */
     public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
         this.currentPart = ((TabbedPropertyViewer)viewer).getWorkbenchPart();
     }
 }

